EP 0787601 A1 19970806 - Tread for tyre
Title (en)
Tread for tyre
Title (de)
Lauffläche für Reifen
Title (fr)
Bande de roulement pour pneumatique
Publication
Application
Priority
FR 9601254 A 19960130
Abstract (en)
The tread surface (6), of a pneumatic vehicle tyre, is composed of a tread strip (5) round the circumference. The index surface (i) has a number of cuts across the tread at regular intervals round the circumference. Each cut, in the new tyre, has a mean width (Lo) more than zero and max. 2 mm to give a ratio of mean notches round the circumference (Tci) expressed as the surface area of cuts in the total tread surface area. Each index circumference strip (i) has a mean curvature radius (Rci) measured at the tread surface at its centre zone. Each index circumference trip (i) has a mean thickness (Ei) measured between the tread surface and the outer surface (4) of the reinforcement strip (3), at the centre. The ratio of circumference cuts (Tci) is selected as a function of the thickness (Ei) and the mean curvature radius (Rci) so that, when in contact with the ground, all the surface cuts are closed as they contact the ground.
Abstract (fr)
Bande de roulement (5) d'un pneumatique (1) comportant une armature de carcasse (2) renforcé par une ceinture de renforcement (3), la bande de roulement, comportant une surface dite de roulement (6), est divisée en au moins une bande circonférentielle. Chaque bande circonférentielle d'indice (i) est pourvue d'une pluralité d'incisions (71) de faible largeur dans la direction transversale. Sur chaque bande circonférentielle d'indice (i) on définit un taux d'entaillement circonférentiel qui permet de réduire la quantité d'énergie dissipée par déformation lors du roulage du pneumatique (1). <IMAGE>
IPC 1-7
IPC 8 full level
B60C 11/04 (2006.01); B60C 11/12 (2006.01)
CPC (source: EP US)
B60C 11/12 (2013.01 - EP US); B60C 2011/1213 (2013.01 - EP US); Y02T 10/86 (2013.01 - EP US)
Citation (search report)
- [A] EP 0379854 A2 19900801 - SEMPERIT AG [AT]
- [A] GB 727207 A 19550330 - GOODRICH CO B F & FR 1080845 A 19541214 - GOODRICH CO B F
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0787601 A1 19970806; EP 0787601 B1 20070103; CA 2196095 A1 19970731; DE 69737167 D1 20070215; DE 69737167 T2 20071004; FR 2744067 A1 19970801; JP 4271266 B2 20090603; JP H09207523 A 19970812; US 5918654 A 19990706
DOCDB simple family (application)
EP 97100844 A 19970121; CA 2196095 A 19970127; DE 69737167 T 19970121; FR 9601254 A 19960130; JP 1694697 A 19970130; US 78965697 A 19970127